Shipping cost for FBM are outrageous

I’m brand new just posted my first item for FBM. I’m looking at shipping cost online and comparing. USPS is the cheapest, which I expected. But even they are $9.85 for a large envelope going 500 miles. Talk about taking a chunk out of meager profit margins. I like facebook market places idea where they use their buying power to help you on shipping cost. Hopefully I can find some cheaper alternative for shipping.